Are there any text-based progress bar implementations?

I'm trying to create a terminal-based backup program and I'm looking for some C++ code that creates a text-based progress bar. I understand you can implement it yourself with \b but I thought I'd see if there is any well-built implementations already. My favourite i开发者_如何学编程mplementation of a text-based progress bar is pacman's progress bar on arch linux.

My project is created with C++ (Qt4).

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The Boost Timer library has a progress timer display.